// Copyright 2021 Matrix Origin
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package handle

import (
	"io"
	"sync"

	"github.com/matrixorigin/matrixone/pkg/common/moerr"
)

var (
	ErrIteratorEnd = moerr.NewInternalErrorNoCtx("end of interator")
)

// Iterator TODO: this is not thread-safe
type Iterator interface {
	sync.Locker
	RLock()
	RUnlock()
	io.Closer
	Valid() bool
	Next()
	GetError() error
}
type BtreeIterator interface {
	sync.Locker
	RLock()
	RUnlock()
	io.Closer
	Next() bool
	GetError() error
}
